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AstraZeneca’s CEO told CNBC the company did not have a “precise answer” on whether a third dose of its Covid-19 vaccine would be needed.

More places are easing travel restrictions for vaccinated travelers, with some set to require inoculations from all travelers by the summer.

As Covid vaccines rolled out across Europe, hopes were high for a rebound in summer tourism. Instead, the season is looking highly uncertain.

There are quiet concerns in parts of Europe about the Covid beta variant, which was discovered in South Africa.

As the Johnson & Johnson vaccine’s efficacy against delta comes into question, and the drug companies talk about producing booster shots, should you rush to find a booster dose? Here’s what experts say.

Dr. Vin Gupta explains why he’s encouraging patients who received the single-shot J&J Covid vaccine to get a Pfizer or Moderna booster shot.

These are the stocks posting the largest moves in midday trading.

U.S. stock indexes gave up their gains on Friday after a worse-than-expected consumer sentiment reading showed inflation expectations rising.

Stock futures were higher Friday as the first major week of second-quarter earnings wraps up. Wall Street also cheered better-than-expected retail sales.

These are the stocks posting the largest moves before the bell.

See which stocks are posting big moves after the bell on Thursday, July 15.

The blood clotting, which some scientists are now calling vaccine-induced immune thrombotic thrombocytopenia, or VITT, has been linked to both shots.

The lambda variant is becoming dominant in parts of South America, here’s what we know about it so far.

Symptoms associated with Covid-19 are changing with the advent of new variants.

UBS has released its latest stock picks across market sectors in Europe, telling investors it’s too early to shift their portfolios to a more defensive stance.

Several major Australian cities were locked down last week, including Sydney.

Israel, the UAE and Bahrain are still among the top 10 most vaccinated countries, but charts show that their Covid infection trends have varied greatly.

Unvaccinated counties could see increased rates of delta variant transmission.

Covid infections are increasing much more quickly than before, said Indonesia’s health minister, Budi Gunadi Sadikin.

Dr. Vivek Murthy said there is reason to be hopeful that people who received the Johnson & Johnson Covid-19 vaccine may be protected against the delta variant.